Perfavore.

[LAURA!!12]

frazioni letterali ;) per domani

[bimbozza]

[math]\frac{z^3+t^3}{z^2-t^2}: \frac{z^3-z^2t+zt^2}{2z-2t}[/math]

[math]\frac{z^3+t^3}{z^2-t^2} \frac{2z-2t}{z^3-z^2t+zt^2}[/math]

[math]\frac{(z+t)(z^2+t^2+zt)}{(z-t)(z+t)} \frac{2(z-t)}{z(z^2-zt+t^2)}[/math]

[math]\frac{2}{z}[/math]

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[math]\frac{(a-1)(a+1)}{a^2b^2}- \frac{1+2a^2}{a^2}+ \frac{b^2+1}{a^2b^2}[/math]

[math]\frac{(a-1)(a+1)-(1+2a^2)b^2+b^2+1}{a^2b^2}[/math]

[math]\frac{a^2-1-b^2-2a^2b^2+b^2+1}{a^2b^2}[/math]

[math]\frac{a^2-2a^2b^2}{a^2b^2}[/math]

[math]\frac{a^2(1-2b^2)}{a^2b^2}[/math]

[math]\frac{1-2b^2}{b^2}[/math]